ML20086K343

Telecopy AO 75-17:on 750212,excessive Leakage Found Through Check Valve 276Y Downstream of AO-2969-B.Cause Under Investigation.Valve Maintained as Required to Achieve Acceptable Leakage Rate

ML20086K343
Person / Time
Site:	Peach Bottom
Issue date:	02/13/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086K331	List: ML20086K329 ML20086K343
References
AO-75-17, NUDOCS 8401270036
Download: ML20086K343 (1)

Text

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' "PHIIA16.LPHI A ELF.C1RIC_ >" TAM PeacnDelta. Bot tom Atomic Pove{dtation Pennsylvania h 17314 teatu.iry 13, l'31)

Mr. James P. O'Reilly , Di rei: tor Office of Inspection and Enforcement Region i United Staten Nuclear Regulatory Commission 631 Park Avenue t'ing of Prussia, Pennsylvania 19406

Subject:

Abnormal Occurrence 24-Rour Notifica tion Confirming W. T. Ullrich's phone conversation with Mr. Walt Baunack, Region 1 1*nited States Nucicar Regulatory Commission _on February 13, 1975.

Reference:

License Number DPR-44 Technical Specification

Reference:

4. 7. A. 2. f Report No.: 50-277-75-17 Report Date: February 13, 1975 Occurrence Date: Feb ruary 12, 1975 -

Facility:

Peach Bottom Atomic Power Station R.D. 1. L;lta Pennsylvania 17314

Identification of Occurrence,: , ,,

Excessive leakage thru check valve (1" - 276Y) immediately downntream of AO-2969-B (Instrument Nitrogen System).

Conditions Prior to Occurrence:

Unit 2 shutdown for piping inspection.

Description of Occurrence:

During a routine local leak rate test the above identified check valve una foun to leak in excess of 2000 cc/ min.

Designation of Apparent Cause of Occurrence:

l Cause of the leakage is under investigation.

Analysis'of Occurrence:

The safety implications of this occurrence are minimal since the downstream isolation valve, AO-2969B,vas found to close and neal satisfactorily.

Corrective Action: "

The valve vill be maintained as required to achieve an acceptable leakage rate.

Failure Data:

None.

l Ve ry truly youts, W. T. Ullrich, Superintendent Peach Sottom Atomic Power Station

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8401270036 750221 PDR S

ADOCK 05000277 l PDR

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